The Following Are Steps in the Cell-Mediated Immune Response

The following are steps in the cell-mediated immune response. 1.Several cycles of mitosis occur.
2) Antigen is engulfed and presented by a macrophage.
3) Cytotoxic T cells migrate to focus of infection.
4) T cells with specific receptors recognize the antigen.
5) T cells differentiate into cytotoxic T cells or T memory cells.
6) Cytotoxic T cells release perforin and/or lymphotoxin.
The correct sequence for these steps is

A) 4,1,5,3,6,2.
B) 2,4,1,5,3,6.
C) 1,2,4,5,3,6.
D) 3,2,4,1,5,6.
E) 3,6,4,5,1,2.